Method and apparatus for communicating between spaced locations

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids

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G01V 140

Patent

active

051133792

ABSTRACT:
Methods and apparatus for telemetering information between spaced locations in a well drilling system including a borehole filled with drilling fluid, including transmitting at a first location, which may be at the earth's surface, a sequence of pressure pulses, and detecting at a second location, which may be at downhole equipment located in the drill string adjacent the drill bit, the pressure pulses.

REFERENCES:
patent: 2759143 (1956-08-01), Arps
patent: 4078620 (1978-03-01), Westlake et al.
patent: 4520468 (1985-05-01), Scherbatskoy

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